How competitive is this new Fixed May 2017 tariff with those of the Big 6?

Tariffs/Products

How competitive is this new Fixed May 2017 tariff with those of the Big 6?

On average, Co-operative Energy dual fuel customers on the Fixed May 2017 tariff will pay £855 per annum, making it one of the most competitively-priced on the market.

The average cost is calculated using the Ofgem average consumption figures of Electric 3,100kWh and Gas 12,500kWh per annum, against the standard dual fuel tariffs of British Gas and the other Big 6 suppliers.